To Discover the Pathophysiology about the Unknown Ligament Located in the Lateral Side of Levator Ani Muscle

The conception of the project was originated from the finding of a specific ligamentous tissue in the pelvic floor in our previous study. The alignment of the ligamentous tissue is similar to the arcus tendineus fasciae pelvis (ATFP) record in the traditional textbook, which was considered to be the main supporting structure of the vagina. However, the ligament is located with the lateral side of the levator ani muscle, which is between the obturator muscle and the levator ani muscle. In addition, the ligament is more robust and clearer than the ATFP。We can observe the same structures in the six female and male bodies in previous study. So, they were not variant structures. We have not documented the existence of the ligament in our literature and textbooks. With our previous study of the pelvic floor, the true face of some anatomical structures has been gradually unraveled, and of course the understanding of physiological and pathological mechanisms is also involved.In this study, we will conduct a study on the similarity of ligament tissue in this segment, including tissue staining, gross anatomy, confirmation of the correlation between ligaments and adjacent tissues, and imaging-assisted physiological functions. In particular, the structure located in the pelvic floor is dynamic state, and high-speed and sophisticated imaging studies (eg, dynamic MRI) must be used to investigate the physiological functions of anatomical configuration changes.We believe that the study of this ligament must be of great inspiration for the study of stress urinary incontinence, pelvic organ prolapse, chronic pelvic pain and certain pathological causes of lower urinary symptoms.